IQ Test For 8th Graders

Reviewed by Janaisa Harris
Janaisa Harris, BA (Mathematics) |
Mathematics
Review Board Member
Ms. Janaisa Harris, an experienced educator, has devoted 4 years to teaching high school math and 6 years to tutoring. She holds a bachelor's degree in Mathematics (Secondary Education, and Teaching) from the University of North Carolina at Greensboro and is currently employed at Wilson County School (NC) as a mathematics teacher. She is now broadening her educational impact by engaging in curriculum mapping for her county. This endeavor enriches her understanding of educational strategies and their implementation. With a strong commitment to quality education, she actively participates in the review process of educational quizzes, ensuring accuracy and relevance to the curriculum.
, BA (Mathematics)
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IQ Test For 8th Graders - Quiz

Welcome to our IQ Test designed specifically for 8th graders! This challenging quiz is tailored to assess your cognitive abilities and problem-solving skills at an age-appropriate level. It covers a wide range of subjects, including mathematics, logic, verbal reasoning, and visual puzzles. This IQ test is not just about traditional academic knowledge; it's about thinking critically, making connections, and demonstrating your ability to tackle various challenges. Each question is designed to encourage creative thinking and logical deduction, helping you explore your intellectual potential. In this quiz, you'll face questions that require you to employ your logic, reasoning, and mathematical skills. Read more

Test your general knowledge with this trivia on this IQ test for 8th graders! IQ means intelligence quotient and it is a measure of a person's general intelligence. This quiz will help you find out your score and see how intelligent you actually are according to the questions that are presented down below! It's a fun and engaging way to exercise your brain, expand your knowledge, and push your thinking to the limit. Feel free to take your time on each question, but remember that the clock is ticking! Your score at the end will provide you with an estimate of your IQ, giving you insights into your cognitive strengths and areas for improvement. Whether you're preparing for standardized tests, honing your problem-solving skills, or just looking for a mental challenge, this IQ Test for 8th graders is a fantastic opportunity to see how you measure up. Are


8th Grader Math Questions and Answers

  • 1. 

    What is the length of a line segment with endpoints at (1, 3) and (4, 3)?

    • A.

      1 Unit

    • B.

      2 Units

    • C.

      3 Units

    • D.

      4 Units

    Correct Answer
    C. 3 Units
  • 2. 

    What number must be subtracted from 7 to get -7?

    • A.

      -14

    • B.

      7

    • C.

      1

    • D.

      14

    Correct Answer
    D. 14
  • 3. 

    What is the absolute value of -3 - 2?

    • A.

      -5

    • B.

      1

    • C.

      5

    • D.

      -1

    Correct Answer
    C. 5
    Explanation
    The absolute value of a number is its distance from zero on the number line, regardless of direction. To find the absolute value of -3 - 2, you first need to evaluate the expression inside the absolute value brackets:
    |-3 - 2| = |-5|
    Now, since -5 is 5 units away from zero on the number line, the absolute value is 5.
    Therefore, the absolute value of -3 - 2 is 5.

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  • 4. 

    What is the complement of a 76 degree angle?

    • A.

      14 Degrees

    • B.

      104 Degrees

    • C.

      16 Degrees

    • D.

      24 Degrees

    Correct Answer
    A. 14 Degrees
  • 5. 

    What is 10 degrees Celsius in Fahrenheit?

    • A.

      16 Degrees

    • B.

      50 Degrees

    • C.

      34 Degrees

    • D.

      76 Degrees

    Correct Answer
    B. 50 Degrees
  • 6. 

    How many sides does a trapezoid have?

    • A.

      5

    • B.

      6

    • C.

      3

    • D.

      4

    Correct Answer
    D. 4
    Explanation
    The correct answer is 4. A trapezoid is a quadrilateral, which means it has four sides. One pair of opposite sides in a trapezoid is parallel, distinguishing it from other quadrilaterals.

    Rate this question:

  • 7. 

    What is -1 times -2 times -3 times -4?

    • A.

      -12

    • B.

      12

    • C.

      -24

    • D.

      24

    Correct Answer
    D. 24
    Explanation
    When multiplying negative numbers together, the product follows the rules of multiplication, but the result will be positive if there is an even number of negative factors and negative if there is an odd number of negative factors.
    In this case, you have four negative numbers:
    -1 * -2 * -3 * -4
    Since there are four negative numbers, an even number, the product will be positive.
    Now, let's calculate the product:
    (-1) * (-2) * (-3) * (-4) = 24
    So, -1 times -2 times -3 times -4 equals 24.

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  • 8. 

    There are two children in a family, what is the probability that both are girls?

    • A.

      25 percent

    • B.

      40 percent

    • C.

      75 percent

    • D.

      100 percent

    Correct Answer
    A. 25 percent
  • 9. 

    What is true about vertical angles?

    • A.

      They Are equal.

    • B.

      They Are 90 degrees.

    • C.

      They Add to 90 degrees.

    • D.

      They Add to 180 degrees.

    Correct Answer
    A. They Are equal.
    Explanation
    Vertical angles are formed by the intersection of two lines. They are opposite angles and share a common vertex. The property of vertical angles is that they are always equal in measure. This means that if one angle measures a certain number of degrees, the other vertical angle will also measure the same number of degrees. Therefore, the correct answer is "They Are Equal."

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  • 10. 

     If 721 out of 950 people like basketball, how many of 10,000 should like basketball (rounded)?

    • A.

      7700

    • B.

      7500

    • C.

      7589

    • D.

      7210

    Correct Answer
    C. 7589
  • 11. 

    What is 5 degrees Celsius in Fahrenheit?

    • A.

      21 Degrees

    • B.

      45 Degrees

    • C.

      41 Degrees

    • D.

      37 Degrees

    Correct Answer
    C. 41 Degrees
  • 12. 

    What is the complement of a 16 degree angle?

    • A.

      64 Degrees

    • B.

      54 Degrees

    • C.

      74 Degrees

    • D.

      84 Degrees

    Correct Answer
    C. 74 Degrees
  • 13. 

    What is the supplement of a 176 degree angle?

    • A.

      24 Degrees

    • B.

      14 Degrees

    • C.

      -4 Degrees

    • D.

      4 Degrees

    Correct Answer
    D. 4 Degrees
  • 14. 

    If f(x) = 2x - 3, what is f(-3)?

    • A.

      -9

    • B.

      9

    • C.

      3

    • D.

      -3

    Correct Answer
    A. -9
  • 15. 

    How many milliliters are in one cubic centimeters?

    • A.

      1/2 Milliliter

    • B.

      1 Milliliter

    • C.

      2 Milliliters

    • D.

      10 Milliliters

    Correct Answer
    B. 1 Milliliter
    Explanation
    One cubic centimeter is equal to one milliliter. This is because the volume of a cube with sides measuring one centimeter is equal to one cubic centimeter, and since one milliliter is equivalent to one cubic centimeter, the answer is 1 milliliter.

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  • 16. 

    How many cc's are in 15 mL?

    • A.

      0.15 cc

    • B.

      150 cc

    • C.

      15 cc

    • D.

      1.5 cc

    Correct Answer
    C. 15 cc
  • 17. 

    What is 37 degrees Celsius in Fahrenheit?

    • A.

      98.6 Degrees

    • B.

      100 Degrees

    • C.

      65 Degrees

    • D.

      37 Degrees

    Correct Answer
    A. 98.6 Degrees
  • 18. 

    What value of x makes "8 + x = 0.8" a true statement?

    • A.

      -7.2

    • B.

      -8.800000000000001

    • C.

      7.2

    • D.

      8.800000000000001

    Correct Answer
    A. -7.2
  • 19. 

    How many seconds are in 26.9 minutes?

    • A.

      16140

    • B.

      2690

    • C.

      1614

    • D.

      269

    Correct Answer
    C. 1614
  • 20. 

    What is (3a + b)/2c if a = 3, b = 2 and c = 5?

    • A.

      2.2

    • B.

      2.4

    • C.

      1.1

    • D.

      3.3

    Correct Answer
    C. 1.1
Janaisa Harris |BA (Mathematics) |
Mathematics
Ms. Janaisa Harris, an experienced educator, has devoted 4 years to teaching high school math and 6 years to tutoring. She holds a bachelor's degree in Mathematics (Secondary Education, and Teaching) from the University of North Carolina at Greensboro and is currently employed at Wilson County School (NC) as a mathematics teacher. She is now broadening her educational impact by engaging in curriculum mapping for her county. This endeavor enriches her understanding of educational strategies and their implementation. With a strong commitment to quality education, she actively participates in the review process of educational quizzes, ensuring accuracy and relevance to the curriculum.

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  • Current Version
  • Mar 26, 2024
    Quiz Edited by
    ProProfs Editorial Team

    Expert Reviewed by
    Janaisa Harris
  • May 14, 2015
    Quiz Created by
    Thames
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